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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Innate immunity mediated by TLR5 as a novel antiinflammatory target for cystic fibrosis lung disease.

Novel therapies to target lung inflammation are predicted to improve the lives of people with cystic fibrosis (CF) but specific antiinflammatory targets have not been identified. The goal of this study was to establish whether TLR5 signaling is the key molecular pathway mediating lung inflammation in CF, and to determine whether strategies to inhibit TLR5 can reduce the damaging inflammatory response. The innate immune responses were analyzed in both airway epithelial cells and primary PBMCs from CF patients and matched controls. Additionally, 151 clinical isolates of Pseudomonas aeruginosa from CF patients were assessed for motility and capacity to activate TLR5. Blood and airway cells from CF patients produced significantly more proinflammatory cytokine than did control cells following exposure to the CF pathogens P. aeruginosa and Burkholderia cepacia complex (p < 0.001). Stimulation with pure TLR ligands demonstrated that TLR signaling appears to mediate the excessive cytokine production occurring in CF. Using complementary approaches involving both neutralizing Ab targeting TLR5 and flagellin-deficient bacteria, we established that inhibition of TLR5 abolished the damaging inflammatory response generated by CF airway cells following exposure to P. aeruginosa (p < 0.01). The potential therapeutic value of TLR5 inhibition was further supported by our demonstration that 75% of clinical isolates of P. aeruginosa retained TLR5 activating capacity during chronic CF lung infection. These studies identify the innate immune receptor TLR5 as a novel antiinflammatory target for reducing damaging lung inflammation in CF.[1]


  1. Innate immunity mediated by TLR5 as a novel antiinflammatory target for cystic fibrosis lung disease. Blohmke, C.J., Victor, R.E., Hirschfeld, A.F., Elias, I.M., Hancock, D.G., Lane, C.R., Davidson, A.G., Wilcox, P.G., Smith, K.D., Overhage, J., Hancock, R.E., Turvey, S.E. J. Immunol. (2008) [Pubmed]
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